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CryptoHack

A fun, free platform for learning modern cryptography

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Learn By Doing

Learn about modern cryptography by solving a series of interactive puzzles and challenges. Get to know the ciphers and protocols that secure the digital world by breaking them.

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Level Up

Earn points by solving challenges. Finish categories to earn trophies and gain levels to track your progress. Can you reach the top of the scoreboard?

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Fresh Challenges

We are constantly creating new challenges to keep your crypto knowledge up to date. Expect exciting brainteasers and whole new categories as the site continues to grow.

New Challenges
Blind (ECSC 2023 (Norway)) CTF Archive 0
WOTS Up (ECSC 2023 (Norway)) CTF Archive 0
Irish flan (ECSC 2023 (Norway)) CTF Archive 0
WOTS Up 2 (ECSC 2023 (Norway)) CTF Archive 0
Twist and shout (ECSC 2023 (Norway)) CTF Archive 0
Weekly Top Users
#1 leyremonreal 2395
#2 whale120 2130
#3 lalba 1980
#4 ice_cream 1755
#5 YonPog 1725
Recent Solves
Point Negation jebil123
Token Appreciation Mehul_007
JWT Sessions Mehul_007
Background Reading jebil123
Diffie-Hellman Starter 2 Mehul_007
Recent Solutions
Broken RSA zenobia 1
Diffie-Hellman Starter 3 3b0_0d 0
Diffie-Hellman Starter 2 3b0_0d 0
Salty 3b0_0d 0
Modulus Inutilis 3b0_0d 0

Level Up

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